{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T09:42:54.320Z","years_from_j2000":26.683,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"wendelstein-1-b","name":"Wendelstein-1 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":995.7554211692177,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":299.0506412,"dec_deg":17.5699627,"epoch_ra_deg":299.353104,"epoch_dec_deg":17.640932,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Wendelstein-1","semi_major_axis_km":4218659.95374,"periapsis_km":null,"mass_kg":1.1236953951447193e+27,"mass_msun":0.000565123,"constellation":"Sagitta","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/wendelstein-1-b","radius_km":73736.97555906,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Wendelstein-1","host_v_mag":15.564,"uncertainties":{"mass_kg":[2.448593006311973e+26,3.131921287143221e+26],"radius_km":[436.10194969,436.10194969],"distance_ly":[9.605305323758094,9.791214459056636],"host_mass_solar":[0.1,0.1],"inclination_deg":[0.39,0.43],"host_radius_solar":[0.09,0.09],"host_temperature_k":[175,175],"semi_major_axis_km":[224396.80604999998,224396.80604999998],"orbital_period_days":[0.000001,0.000001]},"host_mass_solar":0.65,"inclination_deg":86.12,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.61,"planets_in_system":1,"discovery_facility":"Haleakala Observatory","host_spectral_type":"K7 V","host_temperature_k":4251,"orbital_period_days":2.663416,"transit_midpoint_bjd":2455367.738464,"eccentricity_upper_limit":0.012,"equilibrium_temperature_k":2198},"designations":[{"catalog":"Exoplanet","designation":"Wendelstein-1 b"},{"catalog":"Host star","designation":"Wendelstein-1"}],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}